问题补充：
--- Is there any possibility we can get a ticket for The Shanghai World Expo? --- Of course, yes. You can either go to the Expo in person or buy through the Internet.
A. which; it
B. that; it
C. that; one
D. which; it
答案：
A. which; it
B. that; it
(答案→)C. that; one
D. which; it
解析：Is there any possibility that...“有可能吗”。one代替名词 a ticket表示泛指，所以答案C。
